Machine for applying plastic material



Oct. 25, 1949. c. F. HAMMANN MACHINE FOR APPLYING PLASTIC MATERIAL Original Filed Oct. 20, 1943 10 Sheets-Sheet 1 mi} Mm.

Oct. 25, 1949.

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F. HAMMANN MACHINE FOR APPLYING PLASTIC MATERIAL Griginal Filed Oct. 20, 1943 10 Sheets-Sheet 4 v Ode 2.5, @1949 f c. F. HAMMANN ,4

MACHINE FOB APPLYING PLASTIC MATERIAL ori inal Filed Oct. 20, 1945 10 Sheets-Sheet s I INVENTOR.

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MACHINE FOR APPLYING PLASTIC MATERIAL Origirial Fil ed Oct. 20, 1943 10 Sheets-Sheet 7 3 IN VE/V TOP 1 CUFF I W VIIIIIII/I/I/IIIII/II/I/IIIIIIIIIIIIII/IIIIA I I 4 v v. m 6 8 Obt. 25, 1949. c. F. HAMMANN momma FORAPPL-YING PLASTIC MATERIAL ori inal Filed Oct. 20, 1945 10 shee'ts sheet 9 4 |1||.. I 0 V 3% w H, x u SM n 4. 9 V 2 x Wm m m 5 mm E ,al N}? m m z 2 A m W r m WW? w 1L1: j rd Z 7 m n F 5 0 w E w w 2 2 ll 2 r llw 2 FEE. g 9 5 6 M w B 4 w m [HE 2 H m Oct. 25, 1949. I c. F. HAMMANN MACHINE FOR APPLYING PLASTIC MATERIAL 10 Sheets-Sheet 10 Original Filed Oct. 20, 1945 4 Q JNVENTR. I

Q IiTQ fifi Patented Oct. 25, 1949 MACHINE FOR APPLYING PLASTIC MATERIAL Carl F. Hammann, Boston, Mass, assignor to North American bridge, Mass, a corpora Research Corporation, Camtion of Massachusetts Original application October 20, 1943, Serial No.

506,931, now Patent No. 2,452,565, dated November 2, 1948. Divi ded and this application July 19, 1947, Serial No. 762,136

Claims. 1

This invention relates to apparatus for applying plastic material to articles, and more particularly to machines for applying filler material to the bottoms of shoes.

The present invention is a division of copending application Serial No. 506,931, filed October 20, 1943, which issued on November 2, 1948, as Patent No. 2,452,565. For subject matter shown and described but not claimed in the present and parent application reference is made to other copending divisional applications Serial No. 762,135, filed July 19, 1947, and Serial No. 762,137, filed July 19, 1947.

It is the general object of the invention to provide an automatic machine of this type which will serve its purpose expeditiously and efficiently while requiring a minimum of attention.

In one of its aspects, the invention has the object of providing a machine for applying to articles of varying size, such as shoes, an amount of plastic material which is determined by the size of each individual article. In another aspect, the invention has the object of providing a machine to which shoes can be delivered one at a time, which applies to each shoe a quantity of filler material predetermined in accordance with its measured size, which then spreads and irons this material and distributes it over the area where it is needed, and which then presents for removal the shoe with the filler properly applied thereto.

Other features of the invention are a shoe holding mechanism which not only permits easy application of a shoe and secure holding thereof during the working period proper, but also gauging of the shoe size; a mechanism which permits predetermination of amounts of plastic material; an arrangement for delivering that amount of material; a device interlinking the shoe holding mechanism with the mechanism for predetermining the amount of material; mechanism controlling the delivery of a predetermined amount of material, and only when the shoe has arrived in proper position to receive it; and mechanism for spreading, distributing and ironing the material while preserving the metered amount thereof.

These and other objects, aspects and features will be more fully apparent from the following description of several practical embodiments illustrating the genus of the invention. The description refers to drawings in which:

Fig. 1 is a top plan view, partly in section, of a machine for applying filler material to shoe bottoms and constructed in accordance with this invention;

Fig. 2 is a section on line 2--2 of Fig. 1 omitting the lower portion of the base of the machine and the driving motor housed therein;

Fig. 3 is a section on line 3-3 of Fig. 2 with parts of the shoe-supporting jack mechanism removed;

Fig. 4 is a section on line the base of the machines;

Fig. 5 is a detail, in plan, of part of the turret 4-4 of Fig. 2 through head actuating mechanism;

Fig. 6 is a section on line 6--6 of Fig. 1 with the filler-spreading and distributing mechanism shown in elevation;

Fig. 7 shows a front and side elevation of the horizontal latch which is part of the jack mechanism shown in Fig. 6;

Fig. 8 is an elevation of the vertical latch also shown in Fig. 6;

Fig. 9 is a top view of the cam mechanism for controlling the jack mechanism, also shown in Fi 6;

Fig. 10 is a partial section on line Ill-I0 of Fig. 6, through the jack mechanism;

Fig. 11 is an enlarged vertical section view of parts of the filler material feeding and delivering mechanism shown in Fig. 2;

Fig. 12 is a section through the feeding mechanism, on line l2-l2 of Fig. 11;

Fig. 13 is a section through the delivering mechanism, on line l3-l3 of Fig. 11;

Fig. 14 is a detail of the fixed valve-adjusting cam forming part of the delivery-controlling valve mechanism shown in Figs. 2, 11 and 13;

Fig. 15 is a plan view, partly in section, of the delivery valve;

Fig. 16 is an end elevation of part of the mechanism which spreads, irons and distributes the filler material deposited upon a shoe by the .mechanism shown in Fig. 11;

Fig. 17 is a section, through the slide of the filler distributing mechanism, on line l'l-l'l of Fig. 16; I

Fig. 18 is a similar section, normal to that of .Fig. 17, on line 18-88 of Fig. 17;

Fig. 19 is a horizontal section, through the upper part of the distributing mechanism, on line I9I9 of Fig. 18;

Fig. 20 is a top plan view of part of the mechanism for lubricating the spreading iron;

Fig. 21 is a section on line 2I--2I of Fig. 20 including parts of the lubricating mechanism which are omitted from Fig. 20;

Fig. 22 is a section, through the lubricant container and roller carrier, on line 22Z2 of Fig.21;

Fig. 23 is an elevation of the doctor blade forming part of the lubricating mechanism shown in Figs. 20 and 21;

Fig. 24 is an end elevation of the lubricating mechanism shown in Fig. 20;

Fi 25 is a detail view of the drive, from the motor to the main driving pulleys, also shown in Fig. 4;

Fig. 26 is a vertical section through the feeding clutch mechanism shown in Fig. 1'1;

Fig. 27 is a detail View of the linkage between shoe jack and filler mechanisms as shown in Fig. 2, with the frame omitted:

Fig. 28 is a section on line 2828 of Fig. 27

Fig. 29 is a section on line 2.929 of Fig. 2'7 and Fig. 30 is a section on line 3I]30 of Fig. 27.

The illustrated embodiment of my invention .comprises a base consisting of a rectangular boxlike frame having a bottom wall It (Figs. 1, 3 and 4) to which are secured the lower ends of four corner .posts II whose upper ends abut and are fastened to the under side of a top wall I2 (Figs. 1, 2 and 6.). To the corner posts II are secured sheet metal side walls I3 providing a closed chamber within which certain parts of the machine are housed.

.Rigidly fixed at its lower end to the top wall I! by means of set screws (Fig. 2) is an upstanding pivot post 9 on which is rotatably mounted a turret head I4 driven by a Geneva motion mechanism as follows. To the bottom of head I4 is fastened a centrally disposed radially slotted wheel I 5 (Figs. 2 and 5) which is intermittently engaged by a roll 20 mounted upon the free end of an arm I6 carried by a vertical shaft ll. This arm is continuously rotating while the machine is operating and acts through the slotted Wheel I5 to impart to the turret head I4 contraclockwise (Fig. 1) step by step movement. A circular segment I8 (Figs. 2 and 5) forming part of arm I6 cooperates with arcuate recesses I9 provided upon the periphery of wheel E5 to lock said wheel and the rest of the turret head between the steps of the movement. In the embodiment shown five step movements are imparted to the turret head to effect one complete revolution thereof.

Shoe supporting means, in the present embodiment five jack mechanisms, may be provided at a, b, c, d and 2 (Fig. 1) upon the top side of turret head I4, spaced thereon at equal angles. One of said jack mechanisms may occupy position a at a loading or receiving station A during a period of rest of the turret head, as shown.

While this jack dwells at station A, a last with a partly made shoe S upon it is placed in position thereon, bottom up, as shown in Fig. 6, the jack mechanism being at that time in unlocked condition so that it can be adjusted to fit the size of the lasted shoe.

The first step of the turret head then moves the loaded jack into idle position b (Fig. l) and during this movement the loaded jack is locked in its adjusted condition.

The second step of the turret head brings the loaded jack into position at c (Fig. 1) with its terial is spread, ironed and distributed over the forepartof theshoe by the mechanism that is indicated generally at D in Figs. 1 and 6.

The fourth step of the turret head shifts the jack bearing the filled shoe into position (2 at a delivery station E and unlocks the jack so that the lasted and filled shoe may be removed from the machine while the jack dwells at station E.

The fifth step of the turret head completes one revolution of the same and restores the now empty and unlocked jack to position a at the loading station A.

The hub Men of the turret head, including the slotted wheel I5, rests upon and is supported by a ball bearing 20a (Fig. 2) mounted within a recess provided in top wall l2.

The vertical shaft I! which carries the turretactuating arm I6 is journalled in two bearings one of which is provided on top wall f2 and the other on a gear housing 2| secured to the bottom side of the top wall. Within this housing, and fixed on shaft I1, is a worm gear (Figs. 2 and 4) that is driven by a worm 23 fast on a horizontal shaft 24 journalledat its one end in a bearing on housing 21 and'at its opposite end in a bearing provided upon the bottom-side of top wall I2.

Shaft 24 has loosely mounted on it a stepped pulley 25 constituting one member of a clutch whose other half 26 is 'splin'ed on said shaft 24.. Clutch member 26 is shifted into and outof engagement with the stepped pulley by means of a manually operated shipper member including a yoke -27, shaft 28 and handle "29 (Figs. 1 and 4-), the latter being disposed on the outside of the box-like base of the machine within reach of the operator at leading station A, and the shaft 28 being journalled in bearings provided upon the under side of the top wall I2 of the base. I

The stepped pulley 25 (Fig. 4) is connected by a belt 30 with a complementary stepped pulley 31 fast on the shaft of an electric motor M which is started and stopped by means of a switch (not shown). This motor is the source of power for all operating parts of the machine.

The motor M (Figs. 4 and 25) is secured to a frame 20! having a pair of upwardly extending arms 202 provided at their upper ends with eyes 283 loosely pivoted upon trunnions 204 projecting from opposite sides of the bracket 36. Thus a substantial part of the weight of motor M is borne by the belt 30 which is thereby maintained tight at all times, while the axesof pulley I! and trunnions 204! are in alignment so that the tightness of belt 48 is not affected by swinging movement of frame 2M on the axes of the trunnions.

While the machine is in use the motor M is running continuously and acts through the connections described continuously to rotate the stepped pulley 25. When the clutch member 26 occupies its set position and motor M is running, the stepped pulley 25 continuously rotates worm gear 22 (Fig; 4) shaft I1 and arm I 6 (Fig. 5) in the direction of the arrows, through clutch member 26, shaft 24 and worm 23.

Fixed to the lower end of the continuously rotating vertical shaft 11 is a second crank arm 32 (Figs. 2, 4 and 6) which by means of a connecting rod 33 continuously rocks a gear segment 34 that is pivotally supported at 35 upon a bracket 35 secured to the under side of the top wall I2 of the base. Gear segment 31?. meshes with a pinion 31 fixed upon the lower end of a vertical rockshaft 38 (Figs. 1, 4, 6 and 16). This rockshaft is journalled near its lower end in a bearing provided upon bracket 36 from which it extends upwardly through the top wall 12 provided at its upper end with a pinion 3Q meshing with a rack 49 provided upon one side of a horizontally movable slide ll (Figs. 1. and 6) The upper end of shaft til is journalled in a bearing provided upon one side of an upstanding bracket 42 that is fixed rigidly in position upon the top wall 12 and has horizontal ways 43 (Figs. 6 and 16) supporting slide 41.

It will be clear that as shaft ii is driven to rotate the turret head step by step, it also, through the connections described, reciprocates the slide ll five times during each revolution of the turret head, in timed relation with respect to the step movements of the latter. Slide M is part of the mechanism D provided for leveling and distributing the deposited filler material just before the filled shoe is removed from the machine. During each period of rest of the turret head a shoe, on which a metered quantity of filler material has been deposited, dwells in position to be operated upon by slide ll of mechanism D as shown in Fig. 6, and described in detail below.

The mechanism by which a metered quantity of filler material is deposited upon the forepart of each shoe is indicated generally at C in Figs. 1 and 2 and includes a continuously rotating vertical shaft 3 5 (Figs. 1, 2 and l) journalled near its lower end in a bearing provided upon the under side of top wall l2, and near its upper end in a bearing provided upon the framework of said mechanism C. At its lower end shaft :14 is connected by miter gears 15 (Fig. 4) with one end of a short horizontal shaft l6 journalled in a bearing provided upon the under side of top wall 52. At its opposite end this short shaft carries a pulley 11 connected by a belt :28 with a pulley ts fast on the armature shaft of motor lVI. Thus vertical shaft M, which is the main drive shaft for mechanism C, is continuously rotated while the motor is operating.

The frame 52 of the filler depositing mechanism C is supported in part by the pivot'post 9 (Fig. 2) and in part by two posts 5%, 50 (Figs. 1 and 2) projecting upwardly from the top plate 12 of the base. Rigidly fastened in position upon the top of pivot post 9 is a gauge plate 5! on which the front portion of the frame 52 of the filler depositing mechanism rests and to which it is fastened by screws as shown in Fig. 1.

The frame 52 of the filler depositing mechanism includes, as a rigid part thereof, a horizontal tubular portion or element 53 (Figs. 11, 12 and 13) whose interior provides a cylindrical chamber one end of which is occupied by a feed screw 55 while the opposite end portion provides a delivery chamber 55 which is normally filled with plastic filler material under pressure created by the screw which is continuously rotated as described later. At the bottom of the delivery chamber the fixed tubular frame element 53 has a longitudinal outlet slot 55 which is normally maintained closed by a valve sleeve 51 made at its top 6 with a delivery port in the shape of a longitudinal slot 58. This valve sleeve is normally stationary but is mounted on the tubular frame element 53 for rotary and also axial movement thereon.

At its one end valve sleeve 5'1 has a head 59 (Figs. 2 and 11) formed with a gear 60 and with a circumferential groove 6|. Fixed in position upon the opposite end of said valve sleeve is a collar 82 between which and head 59 are arranged two ported gate sleeves 83 and 64 rotatably mounted one within the other (Figs. 11, 13 and 15). Sleeves 63 and (i l have opposed ports 53a and Ma, respectively, which overlap and jointly define a variable outlet or delivery passage 65 (Fig. 15) that is permanently disposed directly beneath the outlet 56 of chamber 55. It will be clear that by rotatively adjusting the metering sleeves 153 and 64 in opposite directions the size and capacity of the delivery passage will be increased or diminished. It will also be clear that if the cutting delivery valve sleeve 51 is rotated one revolution its port 58 will pass between outlet 56 of member 55 and the composite delivery passage 65 of valve sleeves 63 and 64, with the result that filler material is delivered through passage 65 in amount proportionate to the size of passage 65.

At the conclusion of each step movement of turret head is a lasted shoe is brought into position at c (Fig. 1) where the forepart of the shoe dwells for a period of time directly beneath the composite outlet passage 65, as indicated by dotted lines in Fig. 11. During the following period of rest of turret i i, the valve sleeve 51 is automatically slid axially on the tubular frame element 53 toward the right (Fig. 11) for a purpose that will presently appear, whereupon one complete revolution is imparted to it which carries its port 58 (Figs. 11 and 13) past and between the vertically aligned outlets 56 and 65. As the port 55% passes between these outlets predetermined quantity of the plastic filler material is discharged under pressure from the chamber 55 on to the forepart of the shoe.

Adjacent to the collar t2 (Fig. 11) the sleeves 63 and a l carry radial arms 66 and El, respectively (Fig. 13), provided at their outer ends with cam rolls (it and respectively. These cam rolls engage relatively oblique cam slots is and ill (Fig. 14) formed in an arcuate cam plate l2. fixed on the frame 52 of the filler depositing mechanism. When valve sleeve 51 is axially moved as above described, it carries the two sleeves 63 and 64 with it thereby moving the cam rolls 8% and 69 lengthwise of the stationary cam slots 10 and H with the result that the two sleeves are rotatively adjusted relatively to each other in opposite directions, thereby enlarging the outlet 85 (Fig. 15) to a degree proportionate to the extent of such axial movement. As will appear later the extent of this axial movement is proportionate to the length size of the lasted shoe.

As a shoe is brought into the position indicated by dotted lines in Fig. 11, the delivery passage 65 (Fig. 15) is adjusted to a size appropriate to the size of the shoe, and when the shoe is moved away from this position after the delivery of filler material. has been effected, the three sleeves are automatically returned into normal positions, sleeves (it and iifl being rotated in the opposite sense thereby restoring the delivery passage to its normal minimum size shown in Fig. 15. The means for automatically shifting the three sleeves 56, E3 and 6t axially on the tubular frame element 7 53 in the manner just set forth will presently be described.

Each jack mechanism comprises a heel rest 13 (Figs. 1 and 6) mounted to slide radially in ways it provided upon the top side of turret head and yielding'ly urged toward the axis of the latter by a pair of springs 15. Upon its under side, and near its outer end, each heel rest slide has a depending tubular boss 16 within which is fixed a pintle ll provided at its lower end with an abutment roll it (Figs. 3, 6 and 27). The pintle I1 is fixed within boss it by a transverse :pin 16a with which the outer ends of the springs 15 are connected, the outer end portions of said springs loosely occupying grooves provided upon the bottom side of the heel rest shown in Fig. 10. The inner ends of the springs are fastened to the top of the turret head as shown in Fig. l.

The boss 76 occupies a radial slot '19 (Fig. 3) formed in turret head It and the engagement of the boss with the inner end of this slot limits the inward movement of the heel-rest under the influence of springs 75.

Upon its top side each heel-rest has a V-shaped heel-receiving crotch 81] (Figs. 1, 6 and 10) which is inclined downwardly toward, and faces, the axis of the turret head and into which the heel end of a lasted shoe is wedged so that the shoe is disposed bottom side uppermost and extends upwardly and inwardly therefrom toward the axis of the turret head, with the inner toe end of the lasted shoe abutting the hub of the turret head and supported against the under side of gauge 5| by a toe-rest herein shown as including a roll 8|. This roll is supported for rotation on a horizontal axis which is perpendicular to the medial line of the lasted shoe, the roll being mounted within the bifurcated upper end of a slide 82 mounted within vertical ways provided in hub Ida of the turret head. The lower portion of slide 82 has a vertical bore within which is arranged a coiled spring 83 by which the slide is yieldingly urged upwardly toward, and sometimes against, a stop shoulder B l (Fig. 2), the lower end of said spring abutting the top of the turret head.

Adjacent to the upper end thereof the hub of the turret head has a plurality of radial lugs Mb (Figs. 1 and 6) which provide between them 'V-shaped sockets one of which is disposed immediately above each roll Bl to receive and hold against sidewise displacement, the toe end of the lasted shoe that is in engagement with said roll.

When an empty jack mechanism arrives at the loading station A, its roll-carrying slide 82 is supported in position against its stop 84 by spring 83 as shown in Fig. 2, while the heel-rest 13 is held by springs 15 at the limit of its inward movement with boss 16 against the inner end of its slot 19 and roll 78 at the lower end thereof occupying an inoperative position as shown in Figs. 2 and 3.

While the empty jack mechanism dwells at the loading station A (Fig. l) the operator places the heel end of a lasted shoe within and against the crotch 86 of the heel-rest slide and forces the latter radially outwardly until it is possible to shove the toe end of the lasted shoe into position against the hub of the turret head between the gauge plate 5| and the toe-supporting roll ti as shown in Fig. 6, the operator adjusting the heel end vertically relatively to the heel-rest, if necessary, to set the bottom of the forepart in an approximately horizontal position. When properly placed in position the toe end of the lasted shoe will occupy a position between two of the lugs Mb by which it is held against sidewise displacement. When the lasted shoe is position the roll '18, which was displaced radially outwardly when the lasted shoe was applied to the jack mechanism, occupies an operative position with respect to a cam lever I02 (Fig. 3) that is actuated by roll 1-8 when the respective jack mechanism arrives at th position 0. Actuation of cam lever H32 by roll 18 causes the devices presentl to be described to effect axial adjustment of valve sleeve 59 (Figs. 11, 27, 28 and 29) as described; to adjust the sleeves 63 and it; and to impart a single revolution to valve sleeve 59, while the loaded jack mechanism dwells at c.

As the loaded jack mechanism is moved from the position at a (Fig. 1) to the position at b, the vtwo slides 73 and -82 (Fig. 6) are automatically locked in their adjusted positions as presently to be described and remain so locked until the loaded jack moves from the position at d (Fig. 1) to the position at e, whereupon they are automatically unlocked to permit removal of the filled shoe and its "last at station E.

The mechanism for locking the two slides 7-3 and 82 of each jack mechanism in the positions to which they are adjusted while as station A by application thereto of the lasted shoe comprises .two spring pressed latches -85 and 86 (Figs. 6, 8 and 9 the former cooperating with the rollcarrying slide 32 and the latter with the heelres t slide 73.

The latch 85 is a slide made with a base section .8? slidably mounted within a radial slot 38 (Fig. 3) formed in turret head '14, the base portion being provided upon opposite sides thereof with flanges seated upon the top surface of the turret head. At its inner end the base section 81 is provided with a cam roll 89 which is urged by aspring 90 toward a cam 9i fastened rigidly to the stationary pivot post 9 by a set screw 92 (Fig. 9). The outer end of the base 3'! of latch slide 35 has a pair of blade extensions $33 (Figs. 8 and 9) made at their outer ends with inclined cam surfaces 94 cooperating with complementary cam surfaces 95 (Fig. 7) provided upon latch 35 upon opposite sides thereof. The blade extensions 93 are slidably mounted within a pair of grooves 96 (Fig. 3) constituting a radial track in the top of the turret head. At the outer ends of these grooves the turret head is provided with a cylindrical pocket ill having an apertured bottom wall as shown in Fig. 6.

The latch'86 is loosely fitted within this pocket 91 together with'a pair of springs 98 by which the latch is urged upwardly. As shown in Figs. 6 and 7 the upper end of latch 86 has a radially disrposed rack of teeth 88 cooperating with a radial rack of teeth 5-9 provided upon the bottom of heel-rest slide 73. As shown in Figs. 5 and 8 the latch 85 is provided with a vertical rack of teeth m0 cooperating with a vertical rack of teeth Ill! provided upon toe-rest slide 82.

The fixed cam 9| (Fig. 9) is so constructed that, as each jack mechanism moves from d to c, it acts through cam roll 89 to shift latch 85 radially outwardly against the pressure of its spring 90 thereby unlocking toe-rest slide 82, and at the same time the latch 85, through its cam blades 93, depresses latch '86 thereby unlocking heelrest slide 73. Thereafter the cam 9i maintains both slides 82 and T3 unlocked until the jack mechanism moves from a to b whereupon the cam permits the spring pressed latches to reengage and lock the slides which remain thus locked until the jack mechanism again moves from d to e.

As will be clear from Figs. 1 and 6 the gauge plate 5I provides a projecting circular segmental flange which occupies a stationary position above the circular path of the forepart of the shoe and is of such angular length that it engages and holds the forepart in position until the loaded jack departs from position b.

Adjacent to position there is provided the member I02 referred to above (Figs. 2, 3, 2'7 and 29). This member has the form of a lever which is pivotally mounted at I03 upon the top wall I2 of the base of the machine and normally held by a spring H64 against stop I which may be the flange at the lower end of one of the posts 53. While occupying this normal position the cam face Iil2a of lever I32 is just outside of the path of the cam rolls I8 of the jack mechanisms as the latter move past this lever while empty. When, however, a jack mechanism holding a lasted shoe arrives at position 0 its cam roll 18 occupies an operative position farther away from the axis of the turret head, contacts face Iflfa, and swings cam lever H32 outwardly on its pivot I03 an angular distance proportionate to the size of the shoe on said jack mechanism. It will be observed that the outward radial displacement of cam rolls 18, brought about when the lasted shoes are placed upon the jack mechanisms at station A, varies with the size of the shoes.

Intermediate its ends the cam lever I02 is connected by a universal joint with one end of a link I65 whose opposite end is connected by another universal joint with the lower end of an arm I01 (Figs. 2, 3, 11, 27 and 29) projecting downwardly from a horizontal rockshaft lIIl journalled in a bearing provided upon the frame 52 of the filler depositing mechanism C. This rockshaft is connected by spur pinions III with a second horizontal rockshaft II2 also journalled in a bearing provided on frame 52. This second rockshaft has fixed to its opposite ends two upwardly extending arms H6, 3a whose upper ends are connected by a pair of links II1, I Ila with the opposite legs or branches of a yoke II4 whose upper end is pivotally supported at M5 on frame 52. The legs or branches of yoke II4 are provided at their lower ends with rolls H8 occupying the groove 6! of the head 59 of sleeve valve 51.

It will thus be seen that when a loaded jack mechanism arrives at position 0 (Figs. 1, 2 and 3) the angular displacement of lever I02 due to the engagement therewith of roll 18 of the jack mechanism, acts through the linkage just described to adjust sleeve valve 51 and the two sleeves 63 and 64 axially relatively to the fixed cam plate 12 thereby enlarging the outlet passage 65 (Fig. 15) to a size appropriate for the size of the shoe carried by the jack mechanism.

The fixed tubular frame element 53 (Figs. 11 and 12) has adjacent to its one end and at its top an inlet port H9 in register with the lower end of a conduit I26 formed in frame 52, the upper end of this conduit being in register with an outlet I2I provided through the bottom wall of a hopper I22 adapted to hold a supply of plastic filler material. Intermediate its upper and lower ends this conduit has two enlargements or chambers I23 and I24 within which are arranged, respectively, rotatably supported paddle-carriers I25 and I26. Each of these carriers has a longitudinal transverse slot within which is loosely fitted a paddle blade I21 so that it is movable edgewise transversely or radially with respect to the axis of its carrier. Recesses I28 at opposite sides of chambers I23 and I24 provide cam surfaces engaging the opposite ends of the blades to move the same back and forth as the carriers are rotated in the directions of the arrows in Fig. 12.

The 90 arcuate portions of these recesses to which the reference numerals I28 are applied in Fig. 12 are the only portions of the recesses I23 and I24 which serve as blade-adjusting cams and each of these cam portions acts upon its blade to reverse the position thereof during each halfrevolution of the same.

While the paddles are continuously rotating the filler material is delivered into the upper end of the conduit M and is forced downwardly through the latter by the paddles and delivered into the tubular frame element 53 through inlet H9 (Figs. lland 12). Upon its entrance into the tubular frame element 53 the filler material is forced lengthwise of the latter by the continuously rotating feed screw or worm 54 into the chamber 55. Filler material that is thus forced into chamber 55, except the portions thereof deposited upon the shoes, is discharged from tubular frame element 53 into a vertical cylindrical chamber I25 containing a continuously rotating feed screw I30 by which it is propelled to the upper end of that chamber where the latter is provided at one side thereof with an outlet through which the material is delivered into one end of a horizontal cylindrical chamber I3I. Within the latter is arranged a continuously rotating feed screw which is an integral part of the blade-carrier I25 toward which the material is forced by the feed screw, some of the material being returned to hopper I22 through an inlet I33 and some passing alongside of said blade-carrier into conduit I20.

Feed screw 54 (Fig. 11) is at one end connected to a shaft I34 journalled in a bearing on frame 52 and on this shaft are fixed a pinion I35 and a worm gear I36 between which is provided a spur gear I31 that is loosely mounted on the shaft. Worm gear I36 is continuously driven by a worm I36 (Figs. 11 and 27) fast on the vertical shaft 44 hereinbefore referred to. The pinion I35 continuously drives a gear I38 fast on a shaft I39 projecting from one end of blade carrier I26 and gear I38 continuously drives a gear I46 fast on a haft I 4I projecting from one end of blade carrier I25.

The loose gear I31 (Figs. 11 and 27) is normally at rest and meshes with a pinion I42 fast on one end of a horizontal shaft I43 journalled in a bearing on frame 52 and carrying at its opposite end an elongate pinion I44 meshing with the gear 60 of the rotary sleeve valve 51. It will be clear that gear 6!! always remains in mesh with the elongate pinion I44, however, the sleeve valve 51 is adjusted axially by the yoke I I4.

As shown in Fig. 26 the normally loose and stationary gear I31 has an elongate hub I45 on which is loosely splined a clutch member I46 having at its outer end lugs cooperating with corresponding clutch lugs provided upon the inner face of worm gear I36 toward which said clutch member is yieldingly urged by a coiled spring I41 surrounding the same.

Normally the clutch member I46 is engaged by a cam .detent arm I48 (Figs. 2, 11, 2'1 and 30) by which it is held away from, and out of mesh with, the clutch face of worm gear I 36 so that gear I31, shaft I43 and the sleeve valve 51 are normally at rest. The detent arm I43 is fast on a horizontal rockshaft I49 journaled in bearings on frame 52 and to the outer end of which is fixed a'depending arm F59.

As shown in Figs. 2,3, 27 and 29 the lower end of this depending arm is connected by a universal joint with one end of a link I! whose opposite end is connected by a universal joint with the free end of a lever I52 that is pivotally mounted at I53 upon the top wall I2 of the base of the machine. A spring I54 connected with lever I=52 normally holds the latter at the limit of its movement in one direc tion against a stop I55 herein shown as the flange at the lower end of one of the posts 50 so that it acts through the connections described to maintain the detent arm I48 (Figs. 2, ll, 27 .and 30) in a position at the limit of its movement toward shaft I34 where it holds clutch member I out of engagement with the rotating gear I35.

The hub of lever I52 has a tangentially disposed socket I56 (Figs. 2 and 3-) within which is s'lidably mounted a spring pressed abutment member or latch abutment I51 whereof one end is beveled and projects beyond socket I56 to cooperate with the free end of the cam lever Q02 hereinbefore referred to. The outer exposed end of abutment latch I5! is provided with a flat side surface normally occupying a position in the path of the free end of lever Ill-2 so that when the latter is swung on its pivot by one of the rolls I8 of a last jack mechanism the free end of said lever I02 moves past abutment I57 and in passing swings lever I52 which, through the connections described, momentarily lifts detent M8 (Figs. 2, l1 and 30) from its normal position between clutch members I46 and I36. This movement of the detent permit spring M! (Fig. 26) to shift clutch member I46 into clutching engagement with worm gear I36 which acts through said clutch member to impart a single revolution to gear I37 and sleeve valve 51 whereupon clutch member I 36 is again cammed out of engagement with the worm gear and stopped by detent I48.

Thus detent I 58, clutch member I46 and spring I4! are parts of a one-revolution-and-stop 'mechanism that is controlled and operated by the earn-lever I02 to bring about a single revolution of sleeve valve 51 immediately upon arrival of a loaded jack mechanism in position beneath the filler depositing mechanism C (Figs. 1 and 11). It will be noted that when the loaded jack mechanism departs from this position the spring I04 (Fig. 3) restores lever I02 to its normal position, the nose at the free end of said lever wiping idly acros the outer beveled end of latch abutment I5! as said lever is thus returned.

Near its upper end the cylindrical hopper i212 (Figs'l and 2) is provided at opposite sides with bearings supporting a horizontal transverse shaft I58 on one end of which is fixed a worm gear I59 that is continuously driven by a worm I (59 fast on the upper end of the vertical shaft 44. At its opposite end the shaft I58 is connected by miter gears IfiI with the upper end of a vertical shaft that is an integral part of the feed screw E30 referred to above. Thus all of the material-feeding screws as Well as the paddles I2? (Fig. 11) are in motion while motor M (Fig. 4) is operating.

Near its middle the horizontal shaft I53 (Figs. 1 and 2) is connected by bevel gears I63 with the upper end of a vertical shaft ISA rotatably supported within a fixed bearing provided .at the center of the hopper and to the lower end of this shaft are fixed approximately radial arms I65 each of which is provided at its outer end with an upright scraper blade I66 disposed close to and parallel with the cylindrical wall of the i2 hopper. Shaft I6 arms IE5 and blades 166 constitute a continuously-rotating agitator which dislodges the filler material from the hopper wall and also sweeps said material toward and into the upper end-of conduit I20.

The hopper can be conveniently loaded with filler material by placing a cylindrical container P with the viscous material in inverted position upon the conical section I22a of the hopper (Fig. 2). The material will then flow intothe hopper while the entire mass is fairly well sealed from the atmosphere, which is often desirable.

After a predetermined quantity of filler material has been delivered on to the shoe at station C (Fig. l) the next step movement of the turret head brings the shoe into position opposite the mechanism D which spreads, irons and distributes the deposited filler material within the forepart'cavity of the shoe.

The horizontally'and radially movable slide 4! of this mechanism D (Figs. 6 and 16) has at its inner end vertical ways within which is mounted a slide consisting of two telescopically associated sections, namely a lower section I6! (Figs. l6, l7 and 18) and an upper section I68. The lower section 567 has an upper shank portion the outside of which'is rectangular in cross-section and which is slidably fitted within'the vertical ways of slide ll so that it is held against rotating on its vertical axis. The upper end portion of the shank has a cylindrical bore I69. The upper section I68 has a tubular lower end portion slidably fitted within thebore I69. At the upper end of this cylindrical portion there is provided a rectangular flange Ill!) which slidably fits within the ways of slide 4| Within which the shank It? is also mounted, thereby to hold said upper-section I68 against rotation on its axis.

movement of the two sections away from each other under the influence of a coiled spring I12 arranged within the tubular section I63.

The upper endof this spring H2 abuts the section Iii-5 and its lower end abuts section I61,

the spring being assembled-under substantial initial compression .so as to firmly yet yieldingly .maintain the slide Iii-56.8 extended as shown in Figs. 16, Hand 18, while the lower end thereof is not in engagement with a shoe.

The lower slide section I61 has a yoke I13 within which is loosely inserted a metal shoe or .pad I74 mounted forindependent rocking movement on the axes .of we. relatively perpendicular pintles I15 and lit by which said shoe or pad is connected with the oppositely disposed legs of the yoke I13. At its upper end the slide section I68 is providedwith a cam roll I71 which is yieldingly held against-a cam rail I'IB (Figs. 1,

6 and 16) bya pair-of coil springs I79 (Fig. 17)

whose joint effective strengthis less than that of the spring I7 2. Each of these two springsis seated within a vertical chamber provided within the'head at the inner end of slide AI and has seated upon itsupper end the head of a screw I80 whose shank extends downwardly through its spring and loosely 'through a hole provided at the bottom-of its chamber to theyoke I'I3 to which its lower 'end is rigidly connected.

The cam-rail -I-'I'-8 is fixedly bolted in position against one side of t-he'upstan-dlng bracket 42 (Figs. 6 and 16) and it will be clear that the springs I12 and I19 (Fig. 17) yieldingly hold the cam roll I11 of the combination slide I61-I68 against the cam rail at all times during the movements thereof back and forth with slide 4!. At its inner end the cam rail I18 has, upon its under side, an incline I 18a, which forces the upper section I68 of the combination slide downwardly as slide 41 nears the limit of its movement toward the axis of the turret head, and against which the roll I11 is maintained by the springs at the start of the outward movement of slide M in the opposite direction.

After the shoe has received, at position (Fig. l) a metered quantity of filler material, the turret head has another step movement imparted to it which brings the shoe into position d where it is opposite the upstanding bracket 42 of mechanism D. Immediately after arrival at this position the slide 4i nears the limit of its inward movement toward the axis of the turret head thus causing the cam roll 111 to descend on cam H811 and the pad lie to move obliquely down wardly into position on to of the forepart of the shoe, the latter part of this movement of the slide 4I causing the pad to slide on said forepart and the gimbal joint I15-I18 (Fig. 17) permitting the same to fit itself to said forepart.

The pad I14 seats upon the top of the shoe and upon the filler material thereon before roll I11 reaches the lower end of cam incline I18a so that during the remainder of th downward movement of the roll the upper section I88 of the combination slide ISL-I63 is adjusted downwardly relatively to the lower section I81 thereby compressing spring I12. During the first part of the movement of roll I11 down the cam incline I18a, prior to the engagement of the pad 114 with the lasted shoe, only the springs I19 are compressed, but after such engagement, and until th roll I11 reaches the bottom of cam incline I18a, the spring I12 only is gradually compressed, the Springs I19 being disturbed only by unevenness or inclination of the forepart of the lasted shoe relatively to the horizontal path of slide 4|.

Thus during each inward movement of slide 4| the pad I14 moves obliquely downwardly into engagement with the forepart after which it slides inwardly for a substantial distance under the pressure of spring I12, and during each outward movement of slide ll the pad I14 first slides outwardly on the forepart for a substantial distance while under the pressure of spring I12; then obliquely upwardly away from the forepart, and then outwardly on a horizontal path for a substantial distance. As the pad I14 is guided horizontally by rail I18 during its back and forth movements a lubricant is automatically applied to its flat bottom surface by a lubricating device which is indicated generally at I8I in Figs. 6 and 16 and shown in detail in Figs. 21 to 24, inclusive.

This lubricating device comprises a vessel I82 in the form of a trap rigidly fastened by screws to one side of bracket 42. Pivotally mounted at I83 on the top of vessel I82 is a frame or yoke I84 on the free end of which is journaled a pair of parallel and contacting, freely rotatable rollers I85 and I86 disposed one above the other, the roller I86 being partly submerged in a body of liquid lubricant I81 maintained within the vessel I82.

The free end of frame I84 rests upon two plungers I88 each of which is supported by a spring I89 mounted within a pocket provided in vessel I82, these springs acting through the plungers yieldingly to support fram I84 in an elevated position against a pair of stops I99 projecting from said vessel, with the upper portion of roller I85 in the path of the bottom portion of the pad I14 when the roll I11 of combination slide I61I68 (Fig. 17) is travelling back and forth against the upper horizontal portion of rail I18.

During these back and forth movements of the pad the latter passes over the roller I85 which rotates against the bottom side of the pad and transfers lubricant to the same. The lower roller I86 is frictionally driven by roller I85 and acts to transfer lubricant from vessel I82 to roller I85.

Alongside of the rollers I85 and I88 there is provided a doctor blade I9I (Figs. 20, 21, 23 and 24) mounted on one end of vessel 82 so that it is vertically movable. This doctorblade occupies a vertical groove provided upon the inner fac of a plate I92 fastened by screws to the end of vessel I82 and is supported by plungers 593 which, in turn, are yieldingly urged upwardly by springs I94. The engagement of lugs I95 provided at the opposite ends of doctor blade I9I (Fig. 23) with abutments provided upon the inner face of plate I92, serves to limit the upward movement of the blade under the influence of the spring-pressed plungers and maintains the top edge of the blade in position to scrape against the bottom side of the pad I14 thereby to remove surplus lubricant from the latter.

The top wall of vessel I82 is provided with a tapped hole into which is screwed the lower end of a pipe conduit I96 whose upper end communicates with the bottom of the interior of an airtight container I91 holding a reserve supply of the liquid lubricant. The lower end of the pipe conduit I96 extends downwardly into vessel I32 a short distance and, owing to barometric action, the level of the lubricant within the vessel will automatically be maintained at a predetermined height closely adjacent to the lower extremity of the pipe conduit. 1

The container I91 is shown as provided with a removable cap I98 normally closing a nipple I99 through which the contents of the container may be replenished as necessary. A normally open shut-off valve 299 is provided in conduit I96 which is closed while this replenishing operation is being carried out.

Recapitulating the above-described functions of the several correlated groups of operative elements of the herein-described embodiment of a machine according to my invention, an entire cycle of operation will now be outlined.

The operator places a lasted partly made shoe on the jack in position a, where it is unlocked due to the function of cam 9I (Fig. 9). The heel of the shoe is first placed within crotch 88 of the heel-rest slide, whereupon the slide and shoe are forced outwardly until the toe end can be placed in position against the turret head between gauge plate BI and roll BI (Fig. 6), care being taken to position the bottom of the forepart approximately horizontal by an up or down movement of the heel part. Exactly horizontal position of the forepart however is not necessary due to the peculiar construction of the spreading and ironing pad.

The roll 18 now occupies a position which defines the size of the shoe as derived from its total length; this position is fixed as soon as the shoe moves into the next position b where cam 9| causes locking of the jack as above described.

With the shoe moving into position 0, roll 18 first rotates cam. lever I'll-2 (Figs. 2' and 3') into a position. which, through linkage MlZ-lllt-JiillH--l'l6l=ll'-fil-64 determines a certain. ro-v tation. of quantity predetermining sleeves 63', 64, which rotation defines that opening of; the filler discharge port which corresponds to the size of the shoe now inposition 0. Lever lfiZnext operates link train l53i52-l5ll-lt9l8.l46-- l-3illd2-lM-6t thereby causing discharge of the. filler through rotation. of; sleeve 59 so that opening 58 passesstationary port 56 and metering opening. 65.

It will be remembered in this connection that cam lever l 82 is not actuated if, with the respective jack empty, roll '58 is in its innermost position in turret. slot '19.

It will further be remembered that the filler material, kept out of contact with the atmosphere by pot. P, is continuously circulated through delivery chamber 55; and maintained under pressure therein so that discharge will instantaneously begin as soon as the discharge port begins to open; the appropriately predetermined. amount of filler is cut off by opening 58 returning into normal position, as shown in Fig. 11.

The shoe, still locked in its jack, now moves into position (1. As pointed out above, immediately upon arrival of the shoe in this position, thelubricated-pad i M slides obliquely down upon the shoe material and due to the gimbal arrangement [15-416 levels the filler material with respect to the shoe. At the same time, the filler spreads out upon the shoe. The pad I'M now slides upon the filler material toward the toe portion of the shoe distributing the filler material firmly throughout this area. Now the pad I'M slides back toward the shank portion of the shoe completing the spreading, distributing and ironing operation. At this point the pad H4 is retracted obliquely and upwardly on its way to be lubricated and scraped for another operation.

The jack now moves into position 6 where it is unlocked so that the shoe can be removed. The next movement returns the jack, still unlocked, into position a where it is ready to receive another shoe.

It should be understood that the present disclosure is for the purpose ofillustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. In. a machine of the type described aspreading mechanism comprising means for supporting a shoe with its sole portion uppermost; a filler spreading pad; a pad holder; a mount in fixed relation to a predeterminable position of said supporting means; means for movably supporting said pad holder on said mount; and means for sliding said pad holder with said pad on said mount from a position of rest into a predeterminable position for spreading and distributing filler material on said sole portion and back into said position of rest.

3. Mechanism according to claim 2 wherein said pad holder includes a member supporting said pad for substantially vertical movement and urging it upwardly and wherein said shifting means includes track means permitting substantially horizontal movement of said holder on said mount, in combination with cam means on said mount engaging said supporting member for moving it vertically while shifting on said track means.

4. Mechanism according to claim 2 including means associated with said mount for scraping said pad as it shifts into said position of rest.

5. Mechanism according to claim 2 including means associated with said mount for lubricating said pad as it shifts into said position of rest.

.6. Mechanism according to claim 2 wherein said pad is secured in said'pad. holder bya gimbal mounting which permits restrictedrotation about mutually perpendicular axes substantially parallel to the sliding motion of said holder when spreading and distributing said material.

7. Mechanism according to claim 6 including means associated with said mount for scraping said pad as it shifts into said position of rest.

8. In a machine of the type described, a plastic distributing mechanism comprising: a spread.- ing and ironing pad; a normally elevated holder for said pad; and means for lowering said holder, progressively compressing said pad. on said plastic, slidably moving said pad on said: plastic in two directions, and returning said holder to its normally elevated position.

9. In a machine of the type described, a plastic distributing mechanism comprising: a. spreading and ironing pad; and means for lowering said holder, progressively compressing said pad on said plastic, horizontally sliding said holder on said plastic in opposite directions, and returning saidpad to its normal position.

10. A machine of the type described having, in combination, means for supporting a shoe; filler leveling and ironing means mounted on said machine and being movable substantially in a horizontal plane; means for moving said shoe supporting means into and out of cooperative relationship with said mechanism; and means for operating said. mechanism when said supporting means and said mechanism are in cooperative relationship,

CARL F. I-IAlVllWANN. 

